DE10117124A1 - Method and device for butt-jointing profiles made of elastomeric material - Google Patents

Abstract

For the butt-jointing of profiles made of elastomeric material, in particular sealing profiles, the profiles or profile pieces are provided with cut surfaces in the connection areas and are then approximated to one another in such a way that a binding gap remains between the cut surfaces, into which a connection material is introduced. The profiles are then brought closer together until their cut surfaces with the connecting material are brought into the remaining system. DOLLAR A The connecting material is pressed directly into the bond gap in the viscous state, preferably extruded as a film into the bond gap.

Description

The invention relates to a method for Butt joints of profiles made of elastomeric material, especially of sealing profiles in which the profiles or Profile pieces in the connection areas of cut surfaces obtained and then be approximated so that a bond gap remains between the cut surfaces, in which a connection material is introduced and the profiles then further approximate each other until their Cut surfaces with the connecting material in connecting Are brought.

The invention also relates to a device for Implementation of the procedure described above.

For profiles of those in question here. Kind of it is mostly around sealing profiles for vehicle construction, with which windows, flaps and doors or similar closures  to be sealed for openings in a vehicle body. Matching profiles or profile pieces become more or less long strands composed of one of the Outline shape of an opening or one which closes the opening Obtained closure part corresponding course, so that the Profiles following the outline or contour in the sealing area are mountable.

This requires profiles or profile pieces for seals or Assemble sealing frame, the assembly by means of corresponding butt joints are made. Either they will Profiles or profile pieces butted or mitred cut, assembled at a predetermined angle. In the profiles have the connection areas Get cut surfaces that are mutually abutting can be. Around the cut surfaces in contact There are different ways to connect them permanently Procedures available. A simple procedure provides to use an adhesive as connecting material, which in the Binding gap is introduced between the cut surfaces, for example, in that the cut surfaces before their Moistened with liquid adhesive accordingly become.

However, the method of sticking together is not suitable for rapid implementation on an industrial scale with high Quantities, since each adhesive has a correspondingly more or less long setting time required.  

Becomes an elastomeric material for sealing profiles used, which has thermoplastic properties, can a butt joint according to another method produce that the cut surfaces by heat be melted and after pressing together are welded as soon as a corresponding cooling of the Connection area is done. Another one The connection process takes time and especially the controlled, d. H. controllable heat treatment, the often only with correspondingly high equipment and procedural effort is possible.

It has also been suggested as Connecting material to use inserts that are made from a Consist of material that is easier on the required Welding temperature to connect the profiles can. The profiles with the pieces inserted in between Connection materials are plasticized or plastic Condition compressed so that after cooling a solid Butt joint is established. Here too are disadvantageous process times, especially the Time until the connection cools down and solidifies must pass so that the trained by butt joint Seal is now manageable as a one-piece part.

The invention has for its object a method to create butt joints of profiles, which quickly  is feasible and thus to maintain short cycle times leads in the manufacture.

This task is procedural due to the characteristics of the Claim 1 solved. More procedural Refinements result from the features of claims 2 to 7.

In the method according to the invention Connection material directly into the bond gap between the Cut surfaces of the ends of Given profiles or profile pieces. The connecting material can be stored in liquid form and is stored in the Binding gap pressed, for example sprayed or extruded. The extrusion process is preferred, the Connection material from in the area of the binding gap held outlet mouthpiece of an extruder as a film is extruded. As a material for training the Connection material can be a plastic, for example thermoplastic elastomer, PVC or the like used be due to its direct contribution to the Bond gap even more or less fluid or viscous is when his attachment to the cut surfaces of the Connection areas are made. This gives the advantage that the cutting surfaces delimiting the bond gap profiles to be joined together also untreated, that is unprepared for the connection process  can. Of course, pretreatment is also necessary possible by temperature or primer.

That extruded as a film directly in the bond nip Connection material replaces the known methods necessary insert plates or insert foils, which are also Let roll magazines pull them into the binding gap.

In principle, the invention accordingly Connection material only while it is being entered in the Binding gap shaped, e.g. B. to the film, and is not prefabricated as it is with insert plates or Connecting foils is the case.

The method according to the invention is particularly suitable Profiles from any combination of materials, if necessary also profiles with inlaid steel reinforcements, Connect aluminum or plastic. Even profiles that are formed in several parts and thus any The combination of materials can be combined through the Connect the inventive method without problems, as extrudable directly into the bond gap Connection material can be used that as particularly connection-friendly with the given Materials of the profiles are recognized. For example, as Connection material a thermoplastic elastomer especially suitable because it is extremely connection-friendly, the connection friendliness is also characterized by the Exit temperature from the extruder, and / or the viscosity  of a film and / or the thickness of the bond gap extruded film can influence.

Once the film of connecting material in the Binding gap is pressed, preferably extruded the profiles merged until the cut surfaces under bilateral contact with the film made of connecting material are merged. Each strand-shaped profile has one appropriate design or application Outer contour over which the brought in in the form of a film Connection material protrudes outwards. Such about Limiting edges of the cut surfaces protruding sections of the connecting material in the invention Process cut away in one step before the now to a gasket composite profile pieces further handling or use.

The method according to the invention is preferably suitable also process different colored connecting materials. The films extruded in the bond nip can pass through multilayered from different co-extruded layers become. The connecting materials can be colored or be transparent. Any adaptation to the respective Use case can be easily produced. Also Changeover times for processing others Connection materials can be advantageously keep it low by doing what you want Extruder processing connecting material at the same time  be kept ready for processing and only theirs Extruder heads can be controlled via valves, for example or if necessary in the area of the to be operated Binding gap are transferred, for. B. by means of a mechanics that can be actuated accordingly.

One created to carry out the procedure According to the invention, the device is characterized by the features of claims 8 to 11. For the device features independent protection is also claimed.

In addition to the advantageous feature that a station of Device as an extruder with a corresponding extruder nozzle for Introducing the connecting material into the binding gap is designed, the device according to the invention also has the particular advantage that their clamp holder for Profile pieces to be connected with one another for cutting Performing a die cut at a Movement movement of the clamp holder are equipped. This Combination enables an advantageous double function of the Clamp holder because the cut surfaces of the in the clamp holders held profiles, then when including the extruded film, a die cut To run. Through this die cut, over Limiting edges of the cut surfaces of the profiles protruding Sections of the connecting material by appropriate Cut away the shape and shape of the contour of the profiles customized.  

After the bonding material has set or hardened are the cut surfaces over the connecting material connected together so that a seal, for. B. a one-piece sealing frame, removed from the device can be.

An embodiment of the invention from which result in further inventive features is in the drawing shown schematically. It shows:

Fig. 1 is a schematic diagram of a device for receiving ends of profiles made of elastomeric material to be connected Vorrich device.

Fig. 2 is a schematic diagram of FIG. 1 in the Ver process stage of the introduction of the Ver binding material in the binding gap, and

Fig. 3 is a schematic view of the procedural step of closing the on device for the purpose of establishing a connection between the profile ends and the connecting material.

Fig. 1 is a schematic diagram, in which a first method step for butt joining profiles is shown.

A profile is labeled 1. The ends 2 and 3 of the profile 1 have frontal cut surfaces 4 and 5 , which were produced with appropriate tools, not shown here. The cut surfaces are guided in a miter cut, so that the ends 2 and 3 of the profile 1 are at an obtuse angle indicated here when the cut surfaces 4 and 5 are brought together.

Clamp holders 6 and 7 are constructed on a device not shown here. Each clamp holder consists of an insert jaw 8 and a closing jaw 9 . These components are identical in the clamp holder 7 and are therefore designated 8 'and 9'.

In the insert jaws 8 and 8 ', the ends 2 and 3 of the profile 1 can each be inserted in such a way that the end cut surfaces 4 , 5 of the profile 1 are flush with the end faces of the insert jaws 8 and 8 '. Such insertion can e.g. B. be carried out manually.

As soon as the ends 2 , 3 of the profile 1 are inserted into the insertion jaws 8 and 8 'as described above, the locking jaw 9 and 9 ' is placed against the insertion jaw 8 and 8 ', so that the ends 2 , 3 of the profile 1 are held clamped in the now closed clamp holders 6 and 7 .

The device can of course with appropriate Actuating means equipped for closing the clamp holder his.

In Fig. 2 the device is shown again in the form of a schematic diagram, the clamp holder compared to Fig. 1 are now shown in the above-described closed position in which the ends of the profile 1 are clamped and held in the closed clamp holders 6 and 7 .

Each clamp holder 6 and 7 is movably arranged on the device, not shown, so that the clamp holders 6 , 7 can be moved together in the direction of the arrows 10 and 11 , such that the cut surfaces 4 and S of the ends held in the clamp holders 6 and 7 z. B. the profile 1 can be brought into contact with each other. The position shown here corresponds to the open position at which the bond gap between the cut surfaces 4 and 5 is still relatively wide. The device carries an extruder 12 with an outlet nozzle 13 , which is positioned so that its mouth over the binding gap between the cutting surfaces 4 and 5 of the ends inserted into the clamp holders 6 and 7 z. B. the profile 1 .

Of course, the extruder 12 can also be an injection unit or the device shown here is basically an apparatus which introduces a liquid or pasty connecting material 14 in the form of a material film into the binding gap, e.g. B. can press or press.

This material film 15 oozes from the nozzle 13 or a mouthpiece in the direction of arrow 16 into the connecting gap and lies in front of the cut surfaces 4 and 5 of the ends seated in the clamp holders 6 and 7 , for. B. the profile 1 .

The clamp holders 6 and 7 are then moved together in the direction of the arrows 10 and 11 , as is indicated in FIG. 3. The same components are designated in FIG. 3 with the same reference numbers. By closing the clamp holders 6 and 7 , a connection is made by means of the film 15 made of connecting material 14 in the binding gap, through which a seal, for example a one-piece sealing frame, is formed from the profile 1 .

The clamp holders 6 and 7 are designed in the device so that in the retracted position, as shown in Fig. 3, punch out the material film 15 corresponding to the contour of the profile 1 , ie there are protruding beyond the boundary edges of the cut surfaces of the profile 1 Cut away sections of the connecting material.

Claims (11)

1. A method for butt-jointing profiles made of elastomeric material, in particular sealing profiles, in which the profiles or profile pieces in the connecting areas receive cut surfaces and are then approximated so that a binding gap remains between the cut surfaces, into which a connecting material is introduced and which Profiles are then approximated further until their cut surfaces are brought into contact with the connecting material, characterized in that the connecting material ( 14 ) is pressed directly into the bonding gap in a viscous state. 2. The method according to claim 1, characterized in that the connecting material ( 14 ) is extruded into the bond gap. 3. The method according to claim 2, characterized in that the connecting material ( 14 ) is extruded as a film ( 15 ) in the bonding gap. 4. The method according to any one of claims 2 and 3, characterized in that at least two connecting materials ( 14 ) are coextruded in the bond gap. 5. The method according to any one of claims 1 to 4, characterized characterized in that as a connecting material thermoplastic elastomer (TPE) is used. 6. The method according to any one of the preceding claims, characterized in that over the boundary edges of the cut surfaces ( 4 , 5 ) of the profile ( 1 ) or the profile pieces projecting portions of the connecting material ( 14 ) are cut away. 7. The method according to claim 6, characterized in that over the boundary edges of the cut surfaces ( 4 , 5 ) projecting portions of the connecting material ( 14 ) are cut away at the moment by the cut surfaces ( 4 , 5 ) of the profile ( 1 ) are so close to each other that connecting system with the connecting material ( 14 ) is given. 8. Apparatus for carrying out the method according to one of claims 1 to 7, with a pair of movably guided clamp holders for the purpose of mutual approximation, into which the profiles can be inserted so that their prepared cutting surfaces face each other and with a device for introducing a connecting material into the Binding gap between the approximated cut surfaces of the profiles inserted into the clamp holders, characterized in that the device for introducing the connecting material ( 14 ) comprises an extruder ( 12 ) and a nozzle ( 13 ) aligned with the binding gap. 9. The device according to claim 8, characterized in that the nozzle ( 13 ) is designed as the connecting material in the form of a film ( 15 ) extruding slot nozzle. 10. Device according to one of claims 8 and 9, characterized in that each clamp holder ( 6 , 7 ) has a pair of the associated profile ( 1 ) positively receiving clamping jaws ( 8 , 8 ') with associated closing jaws ( 9 , 9 '). 11. The device according to claim 10, characterized in that the clamp holders ( 6 , 7 ) on the end faces are aligned with the closed closing gap against the closing surfaces ( 4 , 5 ), are equipped with cutting edges, the shape and course of which corresponds to the contour of the profiles ( 1 ) ,